Improvement in nail-driving machines



' 38h t--Sh 2 H. uuNHAM. ee s e Nail Driving-Machines.`

N0 154,12Q Patented Aug.18,1874.

THE GRFHIC COJHOTU UTN 39& 4 PARK PL f 3.Sheetsf-Sheet`3. `H DUNHAM Nail Driving-Machlnes,

Patented Aug.`18',1874.

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THE GRAPHIC CD. PHUTDLITE'LSQKH YARK FLACE, NX.

UNITED mySTATES PATENT OFFICE. N

HENRY DUNHAM, oE ABINGTON,MASSACHUSETTS.

IMPROVEMENT IN NAIL-DRIVINGMACHINES.

Speciication forming part of Letters Patent No.` 154,129, dated August 18, 1874 applicationled l December 10, 1873.

To all whom it may concern:

Be it known that I, HENRY DUNE-AM, of Abington, in thecounty of Plymouth and State of Massachusetts, have invented certain new and useful Improvements in Machines for Driving Headed Nails; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to certain improvements in nail-drivin g machines for boots and shoes, as is herein more fully shown and de-V scribed.

On the drawings, Figure l represents a front elevation of my invention. Fig. 2 represents a side elevation. Fig. 3 represents a longitudinal section on the line A B, shown in Fig. l, and Fig. 4represents a longitudinal section on the line (l D, shown in Fig. 2.

Similar letters refer to similar parts wherever they occur on the diiferent parts of the drawings.

a. represents the stand of the machine, to which the head b is secured. In upper end of the head b are made bearings c c for the camshaft d, that is set in rotary motion by means of powerappliedto the pulley e, or otherwise, as may be practical: To the shaft dis secured a number of cams, f, g, h, and z', as shown. The cam f is grooved on its face, and is made to operate the driver-bar f', that is for this purpose provided in its upper end with a projection or roller, f, that engages into the groove on the face of the cam f. The cam g is also grooved on its face and operates the feed-bar g', that is for this purpose provided in its upper end with aprojectionor roller, y,

. that engages into the groove on the face of the c am g. The feedbar g is made to slide in guides in the rocking head h', that is made to rock around a fulcrum, k, in the frame b. The head h is made to rock and operated by the cam h, acting on a projection, h, that forms a part of the rocking head, h', as shown in Fig. 4, anda side spring, h'. The last cam t' operates a rocking leven-e", the lower end of which operates asuitable nail picker or feeder, l, that picks the nails from the inclined ways m m and delivers them, one at a time, to the hollow tube a, from which the nail drops through a perforation in the lower end of the feed-bar g, in the space between the movable dies o o, where it is held in a proper position till the driver f" descends and forces the nail into the sole of the boot or shoe. The movable dies o o are forced toward each other by means of side springs p p, secured to the lower end of the rockinghead h', as shown. The dies o o are madeA to slide outward when the driver f descends, forthe purpose of `allowing the head of the nail to pass between them, and are forced back to their original positions, so as to embraceand hold the point of the nail in an exact position, till the driver again descends and drives the said nail into the sole of the boot or shoe. A stationary rest, q. provided with a projecting lip., r, is secured to the underside of the frame b, the object of which is to allow `the sole of the boot or shoe to rest against theunder side of the said lip r during the upward motion of the feed-bar g. The boot or shoe sis placed on a last, t, having a metallic plate, t', on its bottom, against which the nail is riveted or clinched as it is forced down by the driver ff. The last t is secured to a suitable jack, a, that is operated by means of the treadle @and balance -weight w, or similar apparatus, in the ordinary way, so arranged that the boot or shoe may be turned and held in position for the purpose of receiving the nails in any desired place. To the. under side of the feedbar g is secured an awl and feeder, w, as shown, for the purpose of feeding the material with the motion of rocking arm h', and making a hole therein to receive the nail. y is a guide roller, for the purpose of gagin the distance of the nails from the outer edge of the sole of the boot or shoe.

Having thus fully described the nature, construction, and voperation of my invention, I wish to secure by Letters Patent, and claiml. The automatic feeding mechanism for feeding the shoe, as herein shown, in combination with the movable dies o o and the lip r, as and for the purpose set forth and described.

2. The lip r, in combination with the hollow 'tube n, the Ways m, the driver f', and the movable dies 0 07 as and for the purpose set forth.

3. In combination with the driver f', the movable dies o o for receiving the nails7 and a suitable support, u, on which the boot or shoe rests While automatically moved by the feeding-mechanism, as and for the purpose herein shown and described.

4. In combination with the driver j", the Ways m, the fingers for picking the nails from the Ways, and a suitable support7 u, as and y 'for the purpose set forth.

5. The combination of the guide y, as herein shown7 With the movable dies o o and. the driver f7, for the purpose and'n the manner set forth and described.

In testimony that Ii claim the foregoing, I have hereunto set my hand this 1st day of November, 1873.

HENRY DUNHAM.

Witnesses:

ALBAN ANDRN, GEORGE E. PHELrs. 

